v2.4.0.6

ORGANIZATION AND BASIS OF PRESENTATION Narrative 1 (Details) | Mar. 31, 2012
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Organizational Structure And Operations [Line Items] |
Total ownership interest held by general partner | 0.162

X
- Definition The percentage investment held by the general partner of the limited partnership. + References No definition available. + Details
Name: | ns_LimitedPartnershipGeneralPartnerOwnershipInterest
Namespace Prefix: | ns_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ns_OrganizationalStructureAndOperationsLineItems
Namespace Prefix: | ns_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration